Tire-pump



W. J. ASHLEY.

' TIRE PUMP.

APPLICATION FILED IUNEZG, I919.

1 ,333,9-5 5. Patented Mar. 16, 1920.

INVENTOR.

)faZZer 15/2 I BY J/Q ATTORNEY.

rinrrnn s'rATEs PATENT orrron.

r WALTER 3'. ASHLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO ASHLEY MANUFACTURING- COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

, TIRE-PUMP.

Specification of Letters Patent. Patented Mar. 16, 1920.-

Application filed June 2c, 1919; Serial No. 307,005.

2 all whom it may concern:

Be it known that I. WALTER J. ASHLEY, a

citizen of the United States, anda resident.

of-the city of Chicago, county'of Cook, and State of Illinois, have invented certain new and useful Improvements in Tire-Pumps, of which the following is declared to bea full,

- clear, and exact description.

This invention relates to tire pumps and its principal object is to provide a sub stantial and highly efficient pump of this class. The invention has particular reference to hand operated tire pumps, which ordinarily comprise a plunger, a cylinder and a base or foot plate fastened to the lower end of the cylinder. The usual connections between the cylinder and foot plate are very unsatisfactory and frequently leaks occur at said joint, especially if the pump is handled carelessly or thrown about. with the present invention a leak proof joint is obtained and the'danger of loosening the joint by rough usage is reduced to a minimum. The invention consists in the several novel features hereinafter fully set forth and claimed.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1 is a vertical cross section of a tire pump embodying a simple form of the present invention; Fig. 2 is a horizontal sec tion taken through the cylinder, the foot plate being partly broken away; Fig. 3 is a plan of an ec ge expander, forming part of the joint between the cylinder and foot plate, and Fig. i is a vertical longitudinal section of a slightly modified form of the pump.

Referring to said drawing, and first to Figs. 1 to 3 inclusive, the reference character 5 designates a fragment of the cylinder and 6 the foot plate of the pump. The plunger and upper part of the cylinder are not shown, but their construction is well known and requires no description so far as this specification is concerned. AS is customary, the foot plate 6 extends in both directions from a central hollow boss 7 and preferably an internally threaded boss 8 is cast on the base plate, the interior of which leads to the cylinder 5 through an air passage 9 which opens to the cylinder through a centrally located port 10. An outwardly opening check valve (not shown) may be secured in the threaded boss 8 and the usual flexible air pipe connection may lead from the check valve. I

The-inner face 18 of the boss 7' tapers upwardly, and adjacent the bottom 12 said inner face is under cut orformed with a downwardly flaring annular face 11. The cylinder 5 fits tightly against the tapered face 18 and its lower edge portion 13 flares outward and is held 1n said under-cut portlonll by an expander 14. Said expander may be 1n the form of a piece of stamped metal, or;it may be cast or otherwise formed, as dcs1red.

As shown, said expander is in the form of an inverted cup having a centrally apertured end 19, the aperture 16 forming a port between the cylinder 5 and an air passage 9. From the end 19 extends a flaring side wall 20, the lower edge portion of which flares outwardl as at 15.

To provide said tapering and flaring connection between the boss, cylinder and expander, in assembling the parts, the expander is placed on the bottom of the boss, and the cylinder 5 (unp'rovided with the flaring end) is forced into the 'boss with a driving fit. It is forced into the tapered annular space between the tapered faces 18,

20, and the edge portion 13 is forced into the minimizes the danger of its beingloosened in case of rough usage.

In the form seen in F i & the cylinder and base plate are constructed in all essential respects like the ones shown in Figs. 1 and 2. In place of the separate expander the base plate is formed with an annular flaring groove 1'? at the corner formed by the internal face of the boss 7 and bottom 12 thereof. Said groove may be formed in the foot plate by cutting it therein, or the plate may be cast with the groove. The cylinde and foot plate are assembled by forcing the cylinder into the boss far enough to spread its lower end.

More or less variation of the exact details of construction is possible without departing from the spirit of the invention; I desire, therefore, not to limit myself to the exact form of'the construction shown and described, but intend, in the following claims, to point out all of the invention disclosed herein. 7 r I claim as new and desire to secure by Letters Patenti T 1. As a new article of manufacture, a tire pump comprising a foot plate having a boss formed with an internal annular under cut portion adjacent the bottom oi the boss, a separate edge expanding nieinber having an annular saleportion and a flaring edge portion resting upon'the bottom of said boss, and a cylinder having an end portion and a flaring ed go portion held tightly between the inner wall of the boss and the under outpertion of the boss and the annular side portion and flaring edge of the edge expanding memher; 7 '7 2. A tire punrp, comprising a foot plate having a boss formed with an upwardly tapered, internal face and an under out portion adjacentithe bottom, an expander having an upwardly tapered external face and an outwardly flaring lower edge portion, and a cylinder secured between said tapered faces. the edge portion of the cylinder being held in said undercut portion by said flaring edge of the expander.

3. A tire pump, comprising a foot plate hayinga boss formed with an upwardly tapered internal face and an under cut portion adjacent its bottom, an expander having an apertured end and an upwardly tapered side wall, the lower edge portion of which flares outwardly, and a cylinder secured between said tapered faces, the edge portion of the cylinder being held in said under cut portion by said flaring edge of the expander.

' r WVALTER J. ASHLEY. 

